The size controls are in a div with the id
size__ctl (that's two underscores). In Edige, click
CTL+U. Then at the top of the page that is displayed there is a menu bar. The first choice is
elements. Click on that then click
CTL+F. At the top right there will appear a search box. Type
size__ctl in that box and then click on the right-hand search icon. It should show you the size__ctl div. If it shows up, then one of your plugins has probably disabled it. So in conf/userstyle.conf (create if it is not there), enter the following:
#size__ctl{
display:block;
}
Refresh the browser cache.
And it wouldn't hurt to clear out the dokuwiki cache by deleting all the directories in data/cache.
If this doesn't work use the following:
#size__ctl{
visibility: visible;
}
Again refresh the browser cache and clear the dw cache.